Question

During electrolysis of a salt solution 0.05F of electricity deposits 1.6g of divalent metal. Theatomic wt. of the metal is :

• A. 32
• B. 16
• C. 64
• D. 1.6

Answer 1

The correct option is C 64

1 F of charge displaces E g of ion. Where E is the equivalent wt of the ion.
But 0.05 F of charge displaces 1.6 g of metal.
Hence $0.05E=1.6gE=\frac{1.6}{0.05}g=32g$
It is a divalent metal. Hence, $\text{Atomic weight}=E\times 2=32g\times 2=64g$.